1. Division of Mathematics and Physics, Mälardalen University, Box 883, 721 23 Västerås, Sweden https://sites.google.com/view/anatoliy-malyarenko
2. Department of Mechanical Science & Engineering, also Institute for Condensed Matter Theory and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, 61801-2906 USA https://martinos.mechanical.illinois.edu